Hey Naman, I believe Digi recommends to set the sleep controls in the energy saver control panel to "never" ..... PT loses touch with the MAC while it's off in dreamland. BTW, I never shut my MAC off , just the monitor ... I've read and been told by some pretty knowledgable computer geeks that it's harder on the electronics to keep shutting down / restarting than it is to just leave it on. Tony